13221302131 has 4 divisors (see below), whose sum is σ = 13243826232. Its totient is φ = 13198778032.

The previous prime is 13221302119. The next prime is 13221302137. The reversal of 13221302131 is 13120312231.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 13221302131 - 2¹⁵ = 13221269363 is a prime.

It is a super-3 number, since 3×13221302131³ (a number of 31 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 13221302099 and 13221302108.

It is not an unprimeable number, because it can be changed into a prime (13221302137) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11261170 + ... + 11262343.

It is an arithmetic number, because the mean of its divisors is an integer number (3310956558).

Almost surely, 2^13221302131 is an apocalyptic number.

13221302131 is a deficient number, since it is larger than the sum of its proper divisors (22524101).

13221302131 is an equidigital number, since it uses as much as digits as its factorization.

13221302131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22524100.

The product of its (nonzero) digits is 216, while the sum is 19.

Adding to 13221302131 its reverse (13120312231), we get a palindrome (26341614362).

The spelling of 13221302131 in words is "thirteen billion, two hundred twenty-one million, three hundred two thousand, one hundred thirty-one".